/* ═══════════════════════════════════════════
   TIMELINE — Layout y línea de progreso
════════════════════════════════════════════ */

/* ── Keyframes ── */

@keyframes headerOrnamentPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50%       { transform: scale(1.15); opacity: 1; }
}

@keyframes headerTitleIn {
  from { opacity: 0; transform: translateY(30px); letter-spacing: 0.5em; }
  to   { opacity: 1; transform: translateY(0);    letter-spacing: 0.15em; }
}

@keyframes headerSubIn {
  from { opacity: 0; transform: translateY(15px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--tl-pink-glow); }
  50%       { box-shadow: 0 0 0 8px transparent; }
}

@keyframes cardRevealLeft {
  from { opacity: 0; transform: translateX(-70px) rotate(-1.5deg); }
  to   { opacity: 1; transform: translateX(0)     rotate(0deg); }
}

@keyframes cardRevealRight {
  from { opacity: 0; transform: translateX(70px)  rotate(1.5deg); }
  to   { opacity: 1; transform: translateX(0)     rotate(0deg); }
}


/* ── Sección principal del timeline ── */

.timeline-section {
  position: relative;
  min-height: 100vh;
  background-color: var(--tl-bg);
}


/* ── Cabecera del timeline ── */

.timeline-header {
  text-align: center;
  padding: 7rem 2rem 4rem;
  position: relative;
}

.timeline-header__ornament {
  font-size: 2rem;
  color: var(--tl-pink);
  display: block;
  margin-bottom: 1.2rem;
  animation: headerOrnamentPulse 2.5s ease-in-out infinite;
  filter: drop-shadow(0 0 8px var(--tl-pink-glow));
}

.timeline-header__title {
  font-family: var(--font-rom);
  font-weight: 600;
  font-size: clamp(2.5rem, 7vw, 5rem);
  color: var(--tl-text);
  letter-spacing: 0.15em;
  animation: headerTitleIn 1s var(--ease-sharp) 0.2s both;
  margin-bottom: 1rem;
}

.timeline-header__names {
  font-family: var(--font-rom);
  font-style: italic;
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  color: var(--tl-pink);
  letter-spacing: 0.1em;
  animation: headerSubIn 0.8s ease 0.5s both;
  margin-bottom: 0.6rem;
}

.timeline-header__amp {
  margin: 0 0.5em;
  color: var(--tl-text-muted);
  font-style: normal;
}

.timeline-header__dates {
  font-family: var(--font-val);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--tl-text-muted);
  text-transform: uppercase;
  animation: headerSubIn 0.8s ease 0.7s both;
  margin-bottom: 0.8rem;
}

.timeline-header__subtitle {
  font-family: var(--font-rom);
  font-style: italic;
  font-size: 1rem;
  color: var(--tl-text-muted);
  animation: headerSubIn 0.8s ease 0.9s both;
}


/* ── Wrapper del timeline ── */

.timeline__wrapper {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 6rem;
}


/* ── Línea de progreso ── */

.timeline__track {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  pointer-events: none;
}

.timeline__track-bg {
  position: absolute;
  inset: 0;
  background: rgba(255, 77, 109, 0.12);
}

.timeline__track-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: linear-gradient(180deg, var(--tl-red), var(--tl-pink));
  box-shadow: 0 0 12px var(--tl-pink-glow);
  transition: height 0.12s linear;
}


/* ── Lista de eventos ── */

.timeline__list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4rem;
  padding: 0;
}


/* ── Item del timeline ── */

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 2px 1fr;
  gap: 0 2.5rem;
  align-items: start;
  opacity: 0;
}

/* Punto central en la línea */
.timeline__dot {
  position: absolute;
  left: 50%;
  top: 2.2rem;
  width: 14px;
  height: 14px;
  background: var(--tl-pink);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px var(--tl-bg), 0 0 12px var(--tl-pink-glow);
  z-index: 2;
  transition: transform 0.3s var(--ease-bounce);
}

.timeline__item.is-visible .timeline__dot {
  animation: dotPulse 2.5s ease-in-out infinite;
}

.timeline__item.timeline__item--highlight .timeline__dot {
  background: var(--tl-red);
  width: 18px;
  height: 18px;
  box-shadow: 0 0 0 5px var(--tl-bg), 0 0 20px var(--tl-red-glow);
}

/* Posición de la card: izquierda */
.timeline__item--left .event-card {
  grid-column: 1;
  grid-row: 1;
  justify-self: end;
  max-width: 440px;
  width: 100%;
}

/* Vacío en la columna derecha para items izquierdos */
.timeline__item--left::after {
  content: '';
  grid-column: 3;
  grid-row: 1;
}

/* Posición de la card: derecha */
.timeline__item--right .event-card {
  grid-column: 3;
  grid-row: 1;
  justify-self: start;
  max-width: 440px;
  width: 100%;
}

/* Vacío en la columna izquierda para items derechos */
.timeline__item--right::before {
  content: '';
  grid-column: 1;
  grid-row: 1;
}

/* ── Animaciones reveal al hacer scroll ── */

.timeline__item.is-visible.timeline__item--left {
  animation: cardRevealLeft 0.7s var(--ease-cinema) var(--animation-delay, 0s) both;
}

.timeline__item.is-visible.timeline__item--right {
  animation: cardRevealRight 0.7s var(--ease-cinema) var(--animation-delay, 0s) both;
}